6 best pipe sealants

Review of the best according to the editorial board. On the selection criteria. This material is subjective and does not constitute advertising and does not serve as a purchase guide. Before buying, you need to consult with a specialist.

When installing plumbing, heating or sewerage, an important goal is the tightness of the connections. With poor assembly, leaks are possible, which will require dismantling the site and re-doing the work. If the system leaks over time, it can ruin the flooring and even flood the neighbors. Suction of external water or debris into the drain line can disrupt its operation. Here's an overview of the six best pipe sealants selected by our experts based on product characteristics and reviews.

Rating of the best pipe sealants

PVC COSMOFEN SL-660.220

Rating: 4.9

In the first place is the sealant from the German brand COSMOFEN. It is a one-component diffusion adhesive based on vinyl chloride polymers immersed in a solvent. The sealant is white and has a viscosity of 4000 MPa.s. It can be applied at temperatures from +5 to +30 degrees. Functional strength is achieved already after 4 hours. Buyers in reviews warn that the sealant dries quickly – hardening occurs in 60 seconds, so you need to quickly collect the squeeze. The craftsmen are satisfied with the plasticity of the substance, which ensures the preservation of the integrity of the seam despite the vibration of the pipes. Even during application, the product does not drip, but remains viscous, so it is easy to feed it exactly to the junction.

Experts consider this sealant to be the best in terms of strength. It is popularly called 'liquid plastic'. It perfectly fills the gaps in the joints of plastic pipes, merging with the material at the molecular level. The product tolerates ultraviolet rays and does not dry out over time. If you once collect the sewer using this glue, then you will never need to disassemble it to eliminate leaks.

Advantages

• forms a semi-solid glue line;
• good resistance to UV rays;
• does not drip from the tube when turned over;
• resistant to temperature extremes.

disadvantages

• there is an unpleasant smell;
• if it drips on linoleum, it can leave a stain;
• freezes in 60 seconds, so you need to act quickly.

Kim-Tek 101E Silicon Acetat

Rating: 4.8

Second place for sealant from the German manufacturer Kim-Tek. It has a different base – silicone rubber. On contact with moisture in the air, the product hardens, forming an elastic but strong seam. Elongation at break is possible up to 450%, therefore pipes are able to withstand vibration both from fluid movement and from external accidental shocks. Shore A hardness of 20, which makes the product suitable for professional use on riser pipes in multi-storey buildings. Buyers in the reviews like that the sealant can be used even for hot water supply, since the maximum permissible operating temperature is +160 degrees.

Experts found the sealant to be the best for newbies. The film forms on it after 9 minutes. This allows you to assemble a section of sewage or heating and, if something goes wrong, to disassemble the pipes without much effort. The elastic mixture will not have time to stick, so you will not spoil the system elements.

Advantages

• adheres well to the surface;
• easy application;
• elastic seam;
• comfortable long nose.

disadvantages

• gives off an unpleasant odor when dry;
• an assembly gun is required;
• the structure must not be loaded immediately.

KRASS ULTRASEAL

Rating: 4.7

The third place of honor is a pipe sealant from Switzerland. True, a product of the KRASS ULTRASEAL brand is manufactured directly in Poland. The composition contains a silicone component and solvents. For use, you need a mounting gun, but the long nose of the tube makes it easier to feed the glue into the deep joints of plastic pipes. In the reviews, the masters share that adding sealant is easy even after joining the sides. The product is suitable for water supply and sewerage systems used inside and outside the building. But it cannot be used for heating systems, since the maximum positive temperature should not exceed 80 degrees. The product is sold in tubes of 260 g and has a white color, which makes it easy to control the amount of application on dark pipes.

This sealant, according to the editors of the magazine, is the best in terms of storage conditions. It can withstand up to five freezing cycles at a temperature of -35 degrees. Such characteristics make it possible to purchase goods at a bargain price and store them in an unheated building under repair or under construction until use.

Advantages

• resistance to water with constant contact;
• designed for temperatures from -20 to +80 degrees;
• easy application without falling drops;
• high adhesion to glass, ceramics, all types of plastic.

disadvantages

• you need a mounting gun;
• complete drying occurs after 24 hours;
• you can only clean the excess areas on the pipes with a solvent.

TYTAN PROFESSIONAL white 280ml 71552

Rating: 4.6

The review continues with a 280 ml silicone sealant from the TYTAN brand. It creates a seal when connected and is designed for use with materials such as: aluminum, steel, ceramics, hard plastic. Masters in reviews especially praise the sealant for the adhesion of even stainless pipes. The maximum temperature of use is allowed up to +100 degrees, so the substance can be fed into the joints of the heating pipes, provided that the boiler does not boil. Controlling the flow of the product is easy thanks to the white color. Operation of communications with sealant is allowed outdoors at temperatures up to -40 degrees. With such glue, the pipe structure is additionally strengthened, since the seams are elastic and capable of movement up to 20%. When exposed to direct sunlight, the substance is not destroyed.

A feature of the sealant is its sanitary and hygienic properties, which is achieved due to an acid base with a fungicide. We recommend this sealant especially for sewer pipes, since mold will not form in the joints and an unpleasant odor will not appear in the apartment.

Advantages

• suitable for plastic and metal pipes;
• eliminates the risk of fungus;
• elongation at break up to 200%;
• Short A hardness – 18 units.

disadvantages

• the cost is higher than that of others;
• an assembly gun is required.

Penosil S white Н1199

Rating: 4.5

The Estonian manufacturer offers a white sanitary pipe sealant. The seal belongs to the silicone group and is available in 310 ml cartridges. The substance can be used at a temperature of +5 … + 40 degrees, and after hardening, the sealant will be able to withstand drops from -40 to + 100 ° C. The agent has increased water resistance, which ensures reliable tightness throughout the entire service life of communications. In reviews, buyers note excellent adhesion, which increases the strength of the entire structure. But they warn that if you do not remove traces of glue from PVC immediately, then later it will be impossible. The tube spout has a cap, so pipe-laying work can be carried out for several days using one unit of goods.

Our experts considered the sealant to be the best in terms of ease of determining the amount of feed. Other seals have a shrinkage of up to 15%, which must be taken into account when filling the joint. As a result, there is a possibility that the seam volume is too small or, on the contrary, excess, which will have to be quickly removed with a rag. Here, there is no shrinkage at all, so the master can accurately supply the required volume of sealant and not worry that the seam will become thinner after drying.

Advantages

• does not crack;
• can be used inside and outside;
• stretching 200%;
• seam mobility is permissible up to 20%.

disadvantages

• excess fragments are difficult to remove from plastic pipes after drying;
• strong smell.

SOUDAL Fix All FLEXI white 117383

Rating: 4.4

The review of the best sealants is completed by a product from a Belgian brand. We placed it in the last place due to its high cost. The adhesive is composed of SMX hybrid polymers. The paste is designed for wet curing after 10 minutes outside the tube. After hardening, the seam freely transfers temperatures from -40 to +90 degrees. In addition to the white sealant, the manufacturer produces the substance in gray, brown and black. Users in the reviews like that the sealant is practically odorless. This is not a subjective opinion of individual buyers, but one of the features of the product, which is accompanied by the Emicode EC1 Plus certificate. According to the document, the product does not emit volatile organic compounds.

Our experts have awarded the sealant the title of the best because it has a 40 Shore A strength, which is twice the performance of other products. Note the elongation to break – it is 750%! This product is the best for pipe structures with high mechanical stress.

Advantages

• for all types of materials;
• does not leave stains;
• neutral chemical reaction with surfaces;
• almost no smell.

disadvantages

• high price;
• not suitable for heating systems due to inconsistency in the temperature indicator.

Attention! This rating is subjective and does not constitute an advertisement and does not serve as a purchase guide. Before buying, you need to consult with a specialist.