diff --git a/packages/node_modules/@node-red/nodes/core/parsers/70-CSV.js b/packages/node_modules/@node-red/nodes/core/parsers/70-CSV.js
index 31e6505d7..17bf56322 100644
--- a/packages/node_modules/@node-red/nodes/core/parsers/70-CSV.js
+++ b/packages/node_modules/@node-red/nodes/core/parsers/70-CSV.js
@@ -63,7 +63,7 @@ module.exports = function(RED) {
                         if (!(notemplate && (msg.hasOwnProperty("parts") && msg.parts.hasOwnProperty("index") && msg.parts.index > 0))) {
                             template = clean(node.template);
                         }
-                        var ou = "";
+                        const ou = [];
                         if (!Array.isArray(msg.payload)) { msg.payload = [ msg.payload ]; }
                         if (node.hdrout !== "none" && node.hdrSent === false) {
                             if ((template.length === 1) && (template[0] === '')) {
@@ -74,7 +74,7 @@ module.exports = function(RED) {
                                     template = Object.keys(msg.payload[0]);
                                 }
                             }
-                            ou += template.map(v => v.indexOf(node.sep)!==-1 ? '"'+v+'"' : v).join(node.sep) + node.ret;
+                            ou.push(template.map(v => v.indexOf(node.sep)!==-1 ? '"'+v+'"' : v).join(node.sep));
                             if (node.hdrout === "once") { node.hdrSent = true; }
                         }
                         for (var s = 0; s < msg.payload.length; s++) {
@@ -93,7 +93,7 @@ module.exports = function(RED) {
                                         msg.payload[s][t] = node.quo + msg.payload[s][t].toString() + node.quo;
                                     }
                                 }
-                                ou += msg.payload[s].join(node.sep) + node.ret;
+                                ou.push(msg.payload[s].join(node.sep));
                             }
                             else {
                                 if ((template.length === 1) && (template[0] === '') && (msg.hasOwnProperty("columns"))) {
@@ -105,6 +105,7 @@ module.exports = function(RED) {
                                         node.warn(RED._("csv.errors.obj_csv"));
                                         tmpwarn = false;
                                     }
+                                    const row = [];
                                     for (var p in msg.payload[0]) {
                                         /* istanbul ignore else */
                                         if (msg.payload[s].hasOwnProperty(p)) {
@@ -118,21 +119,22 @@ module.exports = function(RED) {
                                                 }
                                                 if (q.indexOf(node.quo) !== -1) { // add double quotes if any quotes
                                                     q = q.replace(/"/g, '""');
-                                                    ou += node.quo + q + node.quo + node.sep;
+                                                    row.push(node.quo + q + node.quo);
                                                 }
                                                 else if (q.indexOf(node.sep) !== -1 || p.indexOf("\n") !== -1) { // add quotes if any "commas" or "\n"
-                                                    ou += node.quo + q + node.quo + node.sep;
+                                                    row.push(node.quo + q + node.quo);
                                                 }
-                                                else { ou += q + node.sep; } // otherwise just add
+                                                else { row.push(q); } // otherwise just add
                                             }
                                         }
                                     }
-                                    ou = ou.slice(0,-1) + node.ret;
+                                    ou.push(row.join(node.sep)); // add separator
                                 }
                                 else {
+                                    const row = [];
                                     for (var t=0; t < template.length; t++) {
                                         if (template[t] === '') {
-                                            ou += node.sep;
+                                            row.push('');
                                         }
                                         else {
                                             var tt = template[t];
@@ -146,19 +148,20 @@ module.exports = function(RED) {
                                             p = RED.util.ensureString(p);
                                             if (p.indexOf(node.quo) !== -1) { // add double quotes if any quotes
                                                 p = p.replace(/"/g, '""');
-                                                ou += node.quo + p + node.quo + node.sep;
+                                                row.push(node.quo + p + node.quo);
                                             }
                                             else if (p.indexOf(node.sep) !== -1 || p.indexOf("\n") !== -1) { // add quotes if any "commas" or "\n"
-                                                ou += node.quo + p + node.quo + node.sep;
+                                                row.push(node.quo + p + node.quo);
                                             }
-                                            else { ou += p + node.sep; } // otherwise just add
+                                            else { row.push(p); } // otherwise just add
                                         }
                                     }
-                                    ou = ou.slice(0,-1) + node.ret; // remove final "comma" and add "newline"
+                                    ou.push(row.join(node.sep)); // add separator
                                 }
                             }
                         }
-                        msg.payload = ou;
+                        // join lines, don't forget to add the last new line
+                        msg.payload = ou.join(node.ret) + node.ret;
                         msg.columns = template.map(v => v.indexOf(',')!==-1 ? '"'+v+'"' : v).join(',');
                         if (msg.payload !== '') { send(msg); }
                         done();