Varieties of glue for plywood and features of its use

Today, no industry is complete without the use of plywood. This multilayer veneer material, which has a strong and stable structure, has found wide application in the construction and manufacture of furniture, during repair work and even in the automotive industry. To connect plywood sheets to each other or attach to a screed of a concrete floor, you can use various fixing materials, but the most convenient of them is glue for plywood.

Features of using glue for plywood

Composition for gluing plywood, many foreign and domestic companies are working on improving it, can be bought at any hardware or construction store. Using glue, you can attach plywood to glass, concrete, wood, metal and other materials, and the connection will be more durable and durable than using nails or screws.

For work with glue special training or special professional skills is not required. The main thing is to act according to the instructions, properly dilute the composition and apply it to the surface, and this is the strength of any novice master.

In addition to the convenience in operation and the strength of the resulting structure, another advantage of the adhesive joint is its resistance to wetting and high wear resistance.

In rooms with heated floors, when heating pipes or special electric panels are pre-laid under the concrete screed, gluing plywood to the concrete floor is the only right solution, since screws and bolts can damage the wiring.

How to glue plywood

Professionals use glue for plywood of the following types:

• two-component polyurethane;
• alcohol based;
• water based.

The speed of repair and the quality of the finish coating depend on the choice of the most suitable adhesive composition.

Two-component polyurethane adhesive

Two-component adhesive contains two or more active components, which in the course of work react with each other and form an astringent. Such agents are much more expensive than single-component compositions, but the strength of the obtained compound is incomparably higher.

Polyurethane adhesive forms both elastic and rigid joints and provides good adhesion to almost all existing materials.

Advantages of two-component adhesive:

• no additional fixing of plywood to the concrete screed with bolts or screws is required;
• the viscous mixture does not spread, it is convenient to apply it with a comb spatula;
• before work, you do not need to worry about the special cleanliness of the base, since the composition well impregnates the treated surface;
• 30 minutes are enough for gluing materials.

One of the significant disadvantages of the polyurethane compound is the allocation of substances hazardous to human health, which occurs when working with any polymers. After complete polymerization, which will take 48 hours, the material becomes completely safe.

Important!

Polyurethane glue hardens within 30-40 minutes, so you should prepare a portion of the adhesive that can be used up over this period of time.

The resulting bonding layer is superior in strength to concrete and can withstand temperatures up to + 55 ° C.

Alcohol glue for plywood

This type of adhesive differs from others in the content of artificial resins, rubber and solvents and is used for gluing plywood with a wooden or cement-sand surface. The advantages of alcohol compounds are ease of use, high drying rate, resistance to moisture penetration.

Rubber glue hardens relatively quickly - in a day you can walk on the glued plywood surface. However, it is better to postpone further work on finishing the floor for 5-6 days. Before gluing wood sheets, it is advisable to fix them to the base with screws.

Alcohol adhesives have a significant drawback - in the process they emit harmful volatile oils and esters and can quickly catch fire. Therefore, when carrying out repairs using alcohol glue, it is necessary to take care of personal protective equipment and comply with fire safety rules.

Water based glue

A striking representative of such adhesive compositions is PVA, consisting of polymers suspended in an aqueous medium. In addition to the fact that such adhesives are able to provide durable elastic joints between plywood sheets and concrete slabs, they are completely harmless and do not emit odorous substances. PVA glue can be used in hospitals, kindergartens and other institutions where people may remain during repairs.

PVA is recommended to be used only for moisture-proof plywood, and the drying time of the composition is 7 days, which greatly complicates the work. In addition, when choosing this tool for gluing plywood, it is necessary to fix the sheets to the screed in advance using bolts and expansion bolt shields.

Overview of adhesives from well-known manufacturers

Many foreign and domestic manufacturers produce glue for plywood. Each of the compounds fully performs its functions, and they differ from each other only in the environmental friendliness of the raw materials, the combination of strength and elasticity, and the duration of polymerization.

Here are some of the most popular two-component plywood glues for customers.

1. Sipol 9. Manufacturer - Italian company Lechner. Epoxy-polyurethane adhesive is used to lay plywood on a concrete floor without additional fasteners. Hardening time is 2 hours.
2. Parketolit 1549. This adhesive is designed and manufactured by Mitol from Slovenia. Polyurethane adhesive is suitable for laying solid wood of any size. Working hours - 1.5 hours.
3. Ibola R 200. The German company Ibola produces a two-component universal hard-elastic adhesive, the working time of which is 1 hour.
4. Stauf PUK. This adhesive composition from the German company Stauf is an elastic adhesive made of polyurethane. Due to its low cost and long (1 hour) working time, it has become a well-known brand in this country.
5. SikaBond-PU. The Swiss company Sika produces two-component adhesive, characterized by a long service life and resistance to low temperatures. This adhesive is very popular in Russia, because for many years it has been of high quality and stability.

When starting to repair the floor in your apartment, first of all, you need to analyze whether you can do it by simply gluing the plywood to the concrete screed or if you need to arrange additional fasteners. Depending on the solution, you should choose a suitable adhesive composition. If in connection with communications under concrete, it is not possible to use dowels and screws to fasten plywood and the base, then only two-component polyurethane adhesive is suitable for work. In other cases, you can use an adhesive based on water or alcohol.