Sealants are adhe­sives and sealants based on liq­uid rub­bers, the main pur­pose of which is to iso­late seams and joints in build­ings from the effects of water, air and steam. A dis­tinc­tive fea­ture of all sealants is their elas­tic­i­ty, that is, the abil­i­ty to change its shape under the influ­ence of mechan­i­cal loads, fol­lowed by a return to its “orig­i­nal posi­tion”. In prac­tice, this means that sealants retain their prop­er­ties even when the bond­ed sur­faces are deformed.

It is com­mon to see ISO 9001 and ISO 9002 cer­ti­fi­ca­tion marks on the pack­ag­ing of build­ing sealants. How­ev­er, it is a mis­take to think that this guar­an­tees a high qual­i­ty prod­uct by default. The fact is that cer­ti­fi­ca­tion of prod­ucts accord­ing to stan­dards 9001 and 9002 only indi­cates the pres­ence of a cer­tain qual­i­ty con­trol sys­tem at the man­u­fac­tur­ing plant. The very qual­i­ty of the sealant is reg­u­lat­ed by ISO 11600, which includes a num­ber of pri­vate stan­dards for such indi­ca­tors as shrink­age (ISO 10563), elas­tic­i­ty (ISO 8339), adhe­sive prop­er­ties (ISO 9047), etc.

Con­sid­er the main types of sealants used in mod­ern con­struc­tion.

Sil­i­cone sealants, sub­di­vid­ed into neu­tral and acetic, have proven them­selves well in work­ing with glass, met­al, ceram­ics and wood. They are dis­tin­guished by high water resis­tance and mois­ture resis­tance, which allows them to be used for seal­ing plumb­ing and kitchen equip­ment, con­struc­tion joints, and to sim­pli­fy the glaz­ing of bal­conies and log­gias. Acetic sil­i­cone sealants are often used in san­i­tary facil­i­ties, they are safe for health and require only min­i­mal pro­tec­tion when work­ing.

Polyurethane sealants are more often used in indus­tri­al con­struc­tion. Their high elas­tic­i­ty is able to with­stand even earth­quakes. They have high adhe­sion to met­al, brick, con­crete, stone and plas­tic. Polyurethane sealants are high­ly tox­ic — even min­i­mal con­tact with exposed skin is unac­cept­able.

Wide­ly used in res­i­den­tial and indus­tri­al con­struc­tion are acrylic sealants. Most often they are used as put­ty for glass­es and for pro­cess­ing inter­nal seams in res­i­den­tial and indus­tri­al build­ings. Being high­ly frost-resis­tant, this sealant, how­ev­er, is not suf­fi­cient­ly resis­tant to mois­ture. Acrylic sealants, like sil­i­cone sealants, are safe for health and do not require the use of spe­cial pro­tec­tive equip­ment when work­ing with them.

Sum­ming up, we empha­size that the cor­rect choice of sealant depends on many indi­ca­tors and is deter­mined, first of all, by actu­al con­struc­tion tasks.

The pub­li­ca­tion is placed on the rights of adver­tis­ing.

Source: TopClimat.com