Product description & use:
Floor sealant 553 belongs to the new generation of MS polymer sealants, which combine the best properties of silicone and polyurethane sealants. The joint compound hardens by a reaction with the humidity of the air, and forms an elastic joint that can absorb movements of up to +/- 25%. Floor sealant 553 has been specially developed for grouting wooden floors and finished parquet, as well as for sealing between floors and other building parts, e.g. walls, stairs, pillars, etc. The joint compound can be sanded and varnished with most usual water- and alcohol-based floor varnishes. Floor sealant 553 is absolutely odorless, neutral and fast-hardening.

Physical / chemical data:
Contents: 290 ml cartridge
Colours: Light Oak, Dark Oak and Black
Type: MS-hybrid polymer, 1-component
Fungicide-treated: No
Density: approx. 1.4 kg/litre
Shelf life: 12 months in unopened packaging when stored in a cool and dry place.

Instructions for use:
Dimensioning of the joint: Joints for which Floor Sealant 553 is used should be dimensioned so that the movement of the free joint substance is below +/- 25%. When using in floor joints, it must be ensured that the width of the joint is sufficient to absorb the temperature- or moisture-related movements as well as any settlements that may occur in the floor. The narrower the joint, the greater the impact will be on the joint surfaces, which increases the risk of joint slippage. The ideal joint size is approx. 10 mm. For joint widths up to 10 mm, the cross section of the joint must be square. For joint widths over 10 mm, the depth must be 2/3 of the width. It is important to avoid adhesion at the bottom of the joint. As a substrate for the joint, either PE tape or a traditional round joint base is therefore used if the depth of the joint also needs to be adjusted. Finally, it is possible to use oven-dried quartz sand as a substrate, but this requires a lot of practice in grouting against such a base.
Preparation of materials: The joint sides must be clean, dry, free of release agent, grease, dust and loose particles. If the floor has been grouted previously, old grouting material must be removed completely. For optimal adhesion, it is recommended to use a router to cleanly cut the joint surface of the floorboards. To ensure the highest possible strength, the joint surfaces are primed with Primer 961. Please note that Primer 961 cannot be recommended on oily floor surfaces outdoors.

In the overview below, the consumption of primer in ml per continuous meter joint.
Joint depth 6 mm 0.7 ml per meter joint
Joint depth 8 mm 1.4 ml per meter joint
Joint depth 10 mm 1.7 ml per meter joint
Joint depth 12 mm 2.1 ml per meter joint (*All consumption is indicative.)

It is recommended that masking tape be used before applying primer and sealant. It is recommended to carry out tests on a case-by-case basis.
Conditions of use: Can be applied at temperatures from +5 °C to +40 °C and a relative humidity of at least 30%.
Application: The threaded top of the cartridge is cut off with a sharp knife, after which the joint tip itself is cut to size with an oblique cut that is slightly smaller than the width of the joint. The sealant is applied using a hand or compressed air gun. After application, the joint is pressed into place, and smoothed with a soapy water-saturated joint stick. Masking tape is removed immediately after the joint has been finished.
Hardening: Film formation: approx. 30 minutes at 20 °C and 50% RH. A joint of 10 x 10 mm is cured in 5 days at 20 °C and 50% RH. The sealant hardens more slowly at lower temperatures and lower humidity.

Post processing
Overpainting / varnishing: The joint compound can be overpainted or varnished after approx. 1 day. Best results are achieved if treatment is carried out within a few days. Floor sealant 553 can be varnished with most water- and alcohol-based varnishes. The products must not contain turpentine or the like. Solvents. Be aware that the movements of the floor are absorbed by the joint compound, thus creating a risk of cracking in the paintwork if it is not sufficiently flexible. If varnishing cannot / must be done several days after grouting, it is recommended that the grout is wiped with alcohol immediately before varnishing. Due to the many different products on the market, we always recommend that you carry out a test with the desired paint/varnish.
Lye & oil treatment: The grout can be treated with lye and oil when it has fully hardened. The products must not contain turpentine or the like. solvents. Note that lye/oil does not penetrate into the sealant, and the joints must therefore be wiped with a cloth. Due to the many different products on the market, we always recommend that you carry out a test with the desired oil/lye.
Sanding: The grout can only be sanded when it has fully hardened.
Cleaning: Tools are cleaned - and sealant is removed - with e.g. gasoline or turpentine. Hardened sealant can only be removed mechanically. Wash hands and skin with soap and water.

Download:
Safety sheet